Aerodramus inquietus
The Caroline Swiftlet, *Aerodramus inquietus*, is a small, dark, and highly aerial bird native to the remote Caroline Islands of Micronesia. Measuring approximately 10-12 cm (4-5 inches) in length with a comparable wingspan, its plumage is a uniform sooty-brown, appearing almost black against the sky, with slightly paler underparts. Distinctive field marks include its slender, streamlined body, long, narrow, swept-back wings, and a subtly forked tail, making it a master of sustained flight. A...
This swiftlet primarily inhabits tropical and subtropical moist lowland forests, often in coastal or hilly areas. It is strongly associated with limestone caves or cliffs used for nesting and roosting, typically found at low to moderate elevations.
This species is an obligate aerial insectivore, primarily consuming a variety of flying insects such as beetles, flies, moths, and ants, caught on the wing during continuous flight.
The Caroline Swiftlet is a gregarious, colonial species, spending nearly its entire life on the wing, only entering caves to roost and nest. Its foraging strategy involves continuous, agile flight, hawking aerial insects over forests, lagoons, and open water. Territorial behavior is primarily cen...
The Caroline Swiftlet is endemic to the Caroline Islands, an archipelago in Micronesia, where it is a year-round resident. Its primary distribution includes the islands of Chuuk (Truk), Pohnpei (Ponape), Kosrae (Kusaie), and Yap. While historically some populations like those on Palau and Yap wer...
Least Concern
- The Caroline Swiftlet possesses the remarkable ability of echolocation, emitting ultrasonic clicks to navigate in the complete darkness of its cave roosts and nesting sites. - Unlike most birds that perch, swiftlets are adapted for continuous flight and cannot perch in the conventional sense, i...